Ted,
As it is one of the later Facile Princeps guns it may well have the “Fore-end Ejecting mechanism” like the DH75 on the opposite page.
Looking at the Greener self acting ejectors, like one below on my Greener made J.V. Needham gun pictured below, a first model Facile Princeps, it was a wonder that they worked when they were new let alone as this one still does after about 140 years.
![[Linked Image from thumbs2.imgbox.com]](https://thumbs2.imgbox.com/b9/4f/XBS5lYbe_t.png)
The system seems to depend on the cocking arm giving the ejector kicker a slap in passing before overriding it to engage the lower cocking hook.